Combined grain thrasher and cleaner



Dec. 20, 1927. 1,653,153

- 1 M. DAVIS COMBINED GRAIN THRASHER AND CLEANER Filed Sept. 9. 1926 3 Sheets-Sheet 1 INVENTQR. jw'arara eBa I bs- ATTORNEyJT Dec. 20, 1927.

M. DAVIS COMBINED GRAIN THRASHER AND CLEANER Filed Sept. 9. 1926 a Sheets-Shed ga a/ 41 A TTORNEYS.

Dec. 20, 1927.

M. DAVIS COMBINED GRAIN THRASHER AND CLEANER Filed Sept. 9. 1926 3 Sheets-Sheet 5 INVENTOR. flora roe Ia BY a ATTORNEYS.

Patented Dec. 20, s 1927.

v iiU-NIITED or rice.

E B elrin c m on eomamnnkonem arnrmsnnn AND V Application iflledtsehtember 9,1926. Serial no. 1134;4'56.

l rnomioa'lly; and which is of light weight ,and

portable chana cter; {for 'yconvenience fin mov hing :it-,to and from the field iofoloerzttion's;

Wiih this general :obj est in pgview the .in- .VQfiiJiOI). consists in :oert'ain' novel rid useful features of construction and combinations ao'lf parts as hereinafter described @and claimed; and in 1oi'derzthat it na'y be fully nnderstood, referenoegis to ibfe had %to the aecompanying drawings, inwhieh: j t

Figure '1 is ai-,-side elevation, partly-broken i ira'wzry, of ---a*m-achine embodying the invengthegtruck flhe features :gof the mmchine v flwhi'eh :;eo inbined; impart novelty to the 1 @118: 'ehine,esqwwhole,are,osdiollows: p p 3 indicates a set of standards mounted upon and secured to thebed of tlie'trnck, -and-A is at iqylindeflextending longitudinally of the ;truek (and bolted [to and between; o piposite standards. The cylinder has inpenv,ing sin ,Lits fiends, -.thet at the receiving "rend fle fll l mmicating with the discharge tend Po f angextensionilcylinder .5 whioh'iis Iclosedet its opposite or outer zend and saidgextension veylinder is adapted to ireeeivei mixed str-ew and grain from a l charging (tube .6, .which is J preferably ,swivelled r as at i7, for conyenien ce in taking straw and grain trom ,a grain header r other means-jotsupply, not show-n.

Straw from the cylinder: sredepted to pass through 1\ the (other or discharge opening lat its oppositenend, v{into Ka suitebly-supported' ten seating 8, provided o with .211 zco nmunioet ingfl tube fl, .fonstetzking thestraiw or dis- Y charging .it into any suitable receptacle.

' ;A sh ft 10 {extends ilongitudinely through the cylinder; icylinder extension 5 I and ,the' "tan easing, and is suitably journgrled in the I This invention relates i to grain thrashing I .an d c1e 2in ngiinaehmes, and has {for iits apriclosed or outer ends of said extension and 'fan nosing,

endfequ pped intone-end with a.

pulley :11 conne'oted'by e belt i-l2 to the ldrive pulley "-13 'ofatlie ;motor or engine '2. o The shaft isiprovided within' extension \5 with arms or heaters 114: inclined toward :oylinder I i A: for .th e purpose of; preliminarily thrashing sandeco-ioperatingwith a suction :tanherein- I after- 1 -i .denti-fied, in Edischztr'ging straw and glf-fllln intokthexcylinder 4; and :mountedwo'n the shaft within cylinder ,4 are thrashing arms 15 for completing the'thras'hing: ofthe grain --fro1n the ,headsiofithe straw. i The oshaft also carries a fan 16 .yvithin the em hoasinggthe function of said ia-n being to create-a i suction for drawing the straw from theoheader or-;other point ot-supply, (not shown) through the tube-=6 successively 5 through the -cy1inder extension, andylinde'r cand into the fan casing; auditor"(meetinge jblast whioh discharges the @straw "through v -the stacking tube 79.. illhe; su etion treated by the efan is,- ga-uged to'hondleithestraw asexfplainedi but his ;not intended to be powerful (enough \to Withdraw from the cylinder the yrelatively heayy grain after it is separated i from the headsof straw.

- :VertiCQ-lly belowethe shaft 10 (the eyli-nder A ,is {provided v rrvithua depending discharge spout, 1 7,}; and vlocated; in. the upper ;end -of t 'e ispout endo-bridging'z said opening is we grid or screen 18 through whiohytheQgrain thrashed from the straw ishdopteddso pass down into {a ehamber'li), equipped at its lower ,end with; grainefeeding, means, prefer weblyQin-the form ode spireltconveyor 20. o

The conveyor is provided {atv one end with a spulleyfil connected byte belt 22, with a ipul-.

ey,2 3 on, the eorrespondingiendx of shat-ft 10, so that power-' -shall be transmitted "from vsaid shaft to #operate the conveyor. At the ,endtoward which the conveyor is: adapted to feed lthe grain, chamber '19 :COHTIIILIIIIGfitGS "With ith6 lower end of an-elevator conveyor hasing. .24, and journaled; on the shaft of the conveyor 20 at the lower endi of said casing .24, vis e sprooket etvhe'el 25 for driving-a con- 26 operating within the inclined conveyor'oasmg 24;. o Forming thelsupport'and ,guide for theupperiend of the-inclined conoveyor isie sprocket wheel 27, and adjacent P I thereto said casing is provided with e'dis eha-rge spout 28 for delivering the grainoarried; up by the inclined conveyoryto an upright tube 29. The tube129-is equipped at its o upper end with i a, smaller extension tube '30 funnelsare supported by hangers 33 W henthe grid is communicating at its opposite end with the stacker tube 9, the arrangement being such that the blast produced by the fan. Within the stacker tube exerts a suction in tube 29 as to admit air under the suction produced in.

tube 9, into the lower end of said tube so that thehusks and chaff which may enter tube29, may, as above explained, pass up through said tube around and therefore without interfering with the discharge of the grain from the lower end of the latter. To make this operation more effective, a second funnel 32 underlies and is spaced from the first to admit additional air, and both depending from tube 29, the stem of the lower'fun nel forming a spout34 for the discharge of the cleaned grain into a sack, wagon, or the like. The lower end of tube 29 and the stem of the uppermost funnel are equipped with adjustable collars 35, so that the air inlet spaces for tube 29 provided between the latter and the uppermost funnel and between the two funnels, may be varied to suit the condition or character of, the grainbeing cleaned. In thisconn'ection it is desired to state that an application now pending, filed July 12, 1926, and serially numbered 121,865, is based on the grain cleaning mechanism described as provided at the lowermost this application. V

To guard against any possibility ofgrain and straw accumulating upon and materially clogging the grid, the upper end of the chamber 19 is provided with a flaring mouth 36 into which depends the lower portion of cylinder 4 and its spout 17 the cylinder and its spout being spaced from the flaring mouth of chamber 19 so as to provide air-inlet, passages 37 normally closed at their upper or intake ends by valves 38, under the suctional power of. the fan. that is when the. grid'is open to the gravitative passage or fall of grain from the cylinder 4 to chamber-19.

clogged however, no appreciable suctional action is exerted by the fan on said valves and nected at their opposite ends to cylinder 4 and to arms 40 projecting from the valves, act to open the latter to re-establish' the suctional action and thereby effect the dislodgment of the clogging matter, and as this is accomplished the suction produced in the air passages immediately recloses the valves. The opening movement is limited by adjustgrain.

as a result springs 39 coning screws 41 carried by arms 40, coming in contact with the cylinder, and the screws can be adjusted to so limit the opening movenentof valves as to accommodate the particular condition or kind of grain being cleaned. In actual service to which the machine has been put, an occasional flutter or movement of the valves can be observed, due to momentary cloggings and the immediately following clearances of the grid.

In the operation of the thjrashing arms'15,

the heavy material, particularly grain, is

thrown foutward by centrifugal force as it is separated from the'straw and chaff into the relatively quiet zone established within'cylinder 4 by providing receiving and discharging openings therefore of smaller diameter than the cylinder; This facilitates the flow or fall of the grain upon the grid without 1 material orappreciable interference onthe part of the straw and'other light particles, and also facilitates theescape of the straw and light particles under the pullof the fan, i

into the fan casing,'practically denuded of The result is that nothing but grain has much opportunity to accumulate onfthe grid and only at relatively wide intervals is there any interference to the continuouspassage of grain to the conveyor'chamber 19,

which occasional interruptions are made but momentary through the automatic opening of the valves-38 by the respective springs, as hereinbefore explained. i

It is believed no other or further recapitulation of the operation is necessary as ,the

particular function of each operative element has been explained in connection with 1 the description thereof,'and while the draw-y ings illustrate" the preferred embodiment of the invention, it will be apparent that the construction may be changed within the spirit and scope'of the appended claims, in various particulars, 'Iclaim:

r 1. In a grain thrashing and cleaning machine, a cylinder having different discharge openings for straw and grainrespectively,

a chamber for thereception of grain passing from the respective discharge opening, and havingla passage connecting the'atmosphere with the. discharge side of the grain discharge opening of, the cylinder, a valve for such passage, I suction tending to evacuate straw from the cylinder through the respective discharge opening and through said air passage and grain discharge opening into the cylinder and means forproducing a.

for efi'ectingclosing movement of said valve.

2. In a grain thrashing and cleaning machine, a cylinder having dlfi'erent discharge openings for straw and grain respectively,

a chamber for the reception of grain passlng from the respectlve d scharge opening, and having a passage connecting the atmosphere with the discharge side of the grain discharge opening of the cylinder, a valve for such passage means for producing a suction tending to evacuate straw from the cylinder through t-lierespective discharge opening and through said air passage and grain discharge opening into thecylinder for effecting closing movement of said valve, and ylelding means for opening said valve in-the event the grain discharge opening of the cylinder becomes clogged to the passage 0t.

grain therethrough. Z r

3. In a grain thrashing and cleaning machine, a cylinder having different discharge openings for straw and grain respectively, a chamber for the'reception of grain passing from the respective discharge opening, and

having a passage connecting the atmosphere with the discharge side of the grain discharge opening of the cylinder, a valve for such passage, means for producing a suction tending to evacuate straw from the cylinder through the respective opening and through said air passage and grain discharge opening into the cylinder for effecting closing movement of said valve, yielding means for opening said valve in the'event the grain discharge opening of the cylinder becomes clogged to the passage of grain therethrough, and adjustable means for abutment against a fixed part ofthe machine for li1n-' iting opening movementof the valve.

l. In a grain thrashing and cleaning machine, the combination of a cylinder having different discharge passages. forstraw and grain, air-currentpr'oducing means for passing unthrashed grain into and straw out of the cylinder, means torthrashing the un thrashed grain within the cylinder, and a yielding'ly-opened valve: for closing the Mormon DAVIS. 

